body {
  -webkit-text-size-adjust: none;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  background-image: url(../images/bg.jpg);
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: fixed;
  line-height: 1;
}
html,
body,
div,
span,
applet,
object,
iframe,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
a,
abbr,
acronym,
address,
big,
cite,
code,
del,
dfn,
em,
img,
ins,
kbd,
q,
s,
samp,
small,
strike,
strong,
sub,
sup,
tt,
var,
b,
u,
i,
center,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
legend,
table,
caption,
tbody,
tfoot,
thead,
tr,
th,
td,
article,
aside,
canvas,
details,
embed,
figure,
figcaption,
footer,
header,
menu,
nav,
output,
ruby,
section,
summary,
time,
mark,
audio,
video,
input {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font-weight: normal;
  vertical-align: baseline;
}
a {
  color: #7e8c8d;
  text-decoration: none;
}
li {
  list-style: none;
}
/* 设置滚动条的样式 */
::-webkit-scrollbar {
  width: 2px;
}
/* 滚动条滑块 */
::-webkit-scrollbar-thumb {
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.1);
}
#app {
  display: flex;
  border-radius: 50px;
  margin: 6px auto;
  width: 860px;
  height: 600px;
  background-color: #fff;
}
#app .sidebar {
  width: 60px;
  height: 600px;
  background: #2b2c2f;
}
#app .sidebar .icon {
  display: inline-block;
  font-size: 26px;
  margin-top: 28px;
  padding: 0 16px;
  box-sizing: border-box;
  color: #adaeaf;
  opacity: 0.8;
  cursor: pointer;
}
#app .sidebar .icon.active {
  color: #00dc41;
}
#app .sidebar .icon:hover {
  opacity: 1;
}
#app .sidebar section {
  position: relative;
  width: 100%;
  height: 100%;
}
#app .sidebar section .avatar {
  width: 36px;
  height: 36px;
  margin: 20px 12px 0 12px;
  border-radius: 2px;
}
#app .sidebar section nav {
  width: 100%;
  text-align: center;
}
#app .sidebar section nav .icon-msg {
  font-size: 22px;
}
#app .sidebar section nav .icon-msg {
  padding: 0 19px;
}
#app .sidebar footer {
  position: absolute;
  bottom: 20px;
  width: 100%;
  text-align: center;
}
#app .sidebar footer .icon-more {
  font-size: 22px;
}
#app .main {
  flex: 1;
  height: 600px;
  background: #f2f2f2;
}
